how to use the json encode in javascript code example

Example 1: turn object into string javascript

var obj = {a: "a", b: "b" /*...*/};
var string = JSON.stringify(obj);
// OUTPUT:
// "{'a':'a', 'b':'b'}"

Example 2: js string to json

var obj = JSON.parse("{no:'u',my:'sql'}");//returnes {no:'u',my:'sql'}